Method and apparatus for requesting and receiving conditional positioning assistance data in mobile wireless communication system

Abstract

A method and apparatus for positioning in a mobile communication system are provided. Method for positioning includes receiving a SIB1, acquiring the SI, transmitting a provideCapabilities, transmitting a RequestAssistanceData, receiving a ProvideAssistanceData, determining a validity of the PRS, receiving a RRCRelease, transmitting a positioning SRS in RRC_INACTIVE state and transmitting and a ProvideLocationInformation in RRC_INACTIVE state. The provideCapabilities includes a first capability information related to PRS in RRC_INACTIVE and a second capability information related to SRS in RRC_INACTIVE.

What is claimed is: 
     
       1. A method by a terminal, the method comprising:
 receiving, by the terminal from a base station, a System Information Block1 (SIB1), the SIB1 includes a scheduling information for a System Information (SI), the scheduling information includes a broadcast status information and a mapping information; 
 acquiring, by the terminal, the SI based at least in part on the scheduling information, the SI includes a first positioning SIB, the first positioning SIB includes a first Positioning Reference Signal (PRS) data, the first PRS data includes one or more nr-DL-PRS-ResourceSets and a first identifier; 
 transmitting, by the terminal to a Location Management Function (LMF), a provideCapabilities, the provideCapabilities includes a first capability information related to PRS in RRC_INACTIVE and a second capability information related to Sounding Reference Signal (SRS) in RRC_INACTIVE; 
 transmitting, by the terminal to the LMF, a RequestAssistanceData, the RequestAssistanceData includes a first cell identity and the first identifier related to the first PRS data; 
 receiving, by the terminal from the LMF, a ProvideAssistanceData, the ProvideAssistanceData includes a second PRS data, the second PRS data includes one or more nr-DL-PRS-ResourceSets and a second identifier and a validity information, the validity information includes one or more second cell identities, 
 determining, by the terminal, a validity of the PRS data based at least in part on the broadcast status information in the scheduling information or the validity information in the ProvideAssistanceData; 
 receiving, by the terminal from the base station, a RRCRelease, the RRCRelease includes a suspendConfig, the suspendConfig includes a 1 bit indicator that indicates small data transmission via Signaling Radio Bearer2 (SRB2) is configured and information related to SRS transmission in RRC_INACTIVE; 
 transmitting, by the terminal, a positioning SRS in RRC_INACTIVE state; and 
 transmitting, by the terminal to the LMF, a ProvideLocationInformation in RRC_INACTIVE state, the ProvideLocationInformation includes at least a time difference between one or more Transmission Reception Points (TRPs), 
 wherein the first cell identity is a Physical Cell Identity and the second cell identity is a New Radio (NR) Cell Global Identity, the NR Cell Global Identity consists of a base station identifier and a cell identifier. 
 
     
     
       2. The method of  claim 1 ,
 wherein a validity of the first PRS data is determined based at least in part on a broadcast status information in the scheduling information and a validity of the second PRS data is determined based at least in part on the validity information. 
 
     
     
       3. The method of  claim 1 ,
 wherein the time difference between one or more Transmission Reception Points (TRPs) is measured based on the first PRS data in RRC_INACTIVE. 
 
     
     
       4. A terminal in a wireless communication system, the terminal comprising:
 a transceiver configured to transmit and receive a signal; and 
 a controller configured to control the transceiver to: 
 receive from a base station a System Information Block1 (SIB1), the SIB1 includes a scheduling information for a System Information (SI), the scheduling information includes a broadcast status information and a mapping information; 
 acquire the SI based at least in part on the scheduling information, the SI includes a first positioning SIB, the first positioning SIB includes a first Positioning Reference Signal (PRS) data, the first PRS data includes one or more nr-DL-PRS-ResourceSets and a first identifier; 
 transmit to a Location Management Function (LMF) a provideCapabilities, the provideCapabilities includes a first capability information related to PRS in RRC_INACTIVE and a second capability information related to Sounding Reference Signal (SRS) support in RRC_INACTIVE; 
 transmit to a LMF a RequestAssistanceData, the RequestAssistanceData includes a first cell identity and the first identifier related to the first PRS data; 
 receive from a LMF a ProvideAssistanceData, the ProvideAssistanceData includes a second PRS data, the second PRS data includes one or more nr-DL-PRS-ResourceSets and a second identifier and a validity information, the validity information includes one or more second cell identities; 
 determine a validity of the PRS data based at least in part on the broadcast status information in the scheduling information or the validity information in the ProvideAssistanceData; 
 receive from the base station a RRCRelease, the RRCRelease includes a suspendConfig, the suspendConfig includes a 1 bit indication that indicates small data transmission via Signaling Radio Bearer2 (SRB2) is configured and information related to SRS transmission in RRC_INACTIVE; 
 transmit a positioning SRS in RRC_INACTIVE state; and 
 transmit to a LMF a ProvideLocationInformation in RRC_INACTIVE state, the ProvideLocationInformation includes at least a time difference between one or more TRPs, wherein the first cell identity is Physical Cell Identity and the second cell identity is NR Cell Global Identity, the NR Cell Global Identity consists of at least a base station identifier and a cell identifier.